When you want a tool that can merge video files of different formats, then All Video Joiner can come to your aid.

This application recognizes AVI, MPG, FLV and DAT extensions, and can output files into the AVI, MP4, MPEG, VCD, SVCD and DVD formats.

The interface of the program is rather plain and easy to navigate through. You can add files to the list by using the "drag and drop" function or through the classic file browser.

In the list you can view the video size, start and end time, as well as subtitle files of each source files. Also, you can preview videos in a small window, as well as sort files. Once you have selected an output directory and format, you can initiate the merging process.

In the "Options" menu, you can configure general settings (e.g. keep original duration, select aspect ratio, zoom video), as well as options for each format type (e.g. video frame rate and size, audio bitrate, channels and sample frequency rate, bits per sample). Resetting settings to default is also possible.

All Video Joiner consumes a moderate amount of system resources, has a well-drawn user manual with screenshots, finishes a task in a reasonable amount of time and keeps a good image and sound quality in the output files.

Besides its merging function, it can also be used as a video converter and the conclusion is that All Video Joiner can be used with confidence by both rookies and experienced individuals.